Springboot实现全局自定义异常的方法详解

public interface BaseErrorInfoInterface {
    /** 错误码
     */
    String getCode();

    /** 错误描述*/
    String getMsg();
}

import lombok.Getter;
@Getter
public enum ErrorCodeAndMsg  implements BaseErrorInfoInterface{
    SUCCESS("200", "成功!"),
    BODY_NOT_MATCH("400","请求的数据格式不符!"),
    SIGNATURE_NOT_MATCH("401","请求的数字签名不匹配!"),
    NOT_FOUND("404", "未找到该资源!"),
    INTERNAL_SERVER_ERROR("500", "服务器内部错误!"),
    SERVER_BUSY("503","服务器正忙，请稍后再试!"),
    STUDENG_NULL("0003", "学号不能为空");
    private String code;
    private String msg;
    ErrorCodeAndMsg(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }
    public String getCode() {
        return code;
    }
    public String getMsg() {
        return msg;
    }
}

import lombok.Getter;

/**
 * 统一异常捕获类
 * Created by Tiger on 2018/10/9.
 */
@Getter
public class StudentException extends RuntimeException{
    private String code;
    private String msg;
    public StudentException() {
        super();
    }

    public StudentException(BaseErrorInfoInterface errorInfoInterface) {
        super(errorInfoInterface.getCode());
        this.code = errorInfoInterface.getCode();
        this.msg = errorInfoInterface.getMsg();
    }

    public StudentException(BaseErrorInfoInterface errorInfoInterface, Throwable cause) {
        super(errorInfoInterface.getCode(), cause);
        this.code = errorInfoInterface.getCode();
        this.msg = errorInfoInterface.getMsg();
    }

    public StudentException(String errorMsg) {
        super(errorMsg);
        this.msg = errorMsg;
    }

    public StudentException(String errorCode, String errorMsg) {
        super(errorCode);
        this.code = errorCode;
        this.msg = errorMsg;
    }

    public StudentException(String errorCode, String errorMsg, Throwable cause) {
        super(errorCode, cause);
        this.code = errorCode;
        this.msg = errorMsg;
    }


    public String getErrorCode() {
        return code;
    }

    public void setErrorCode(String errorCode) {
        this.code = errorCode;
    }

    public String getErrorMsg() {
        return msg;
    }

    public void setErrorMsg(String errorMsg) {
        this.msg = errorMsg;
    }

    public String getMessage() {
        return msg;
    }

    @Override
    public Throwable fillInStackTrace() {
        return this;
    }
}

public class ResultBody {
    /**
     * 响应代码
     */
    private String code;

    /**
     * 响应消息
     */
    private String message;

    /**
     * 响应结果
     */
    private Object result;

    public ResultBody() {
    }



    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Object getResult() {
        return result;
    }

    public void setResult(Object result) {
        this.result = result;
    }

    /**
     * 成功
     *
     * @return
     */
    public static ResultBody success() {
        return success(null);
    }

    /**
     * 成功
     * @param data
     * @return
     */
    public static ResultBody success(Object data) {
        ResultBody rb = new ResultBody();
        rb.setCode(ErrorCodeAndMsg.SUCCESS.getCode());
        rb.setMessage(ErrorCodeAndMsg.SUCCESS.getMsg());
        rb.setResult(data);
        return rb;
    }

    /**
     * 失败
     */
    public static ResultBody error(BaseErrorInfoInterface errorInfo) {
        ResultBody rb = new ResultBody();
        rb.setCode(errorInfo.getCode());
        rb.setMessage(errorInfo.getMsg());
        rb.setResult(null);
        return rb;
    }

    /**
     * 失败
     */
    public static ResultBody error(String code, String message) {
        ResultBody rb = new ResultBody();
        rb.setCode(code);
        rb.setMessage(message);
        rb.setResult(null);
        return rb;
    }

    /**
     * 失败
     */
    public static ResultBody error( String message) {
        ResultBody rb = new ResultBody();
        rb.setCode("-1");
        rb.setMessage(message);
        rb.setResult(null);
        return rb;
    }

    /*@Override
    public String toString() {
        return JSONObject.toJSONString(this);
    }*/
}

@ControllerAdvice
public class GlobalExceptionHandler {
	private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
	/**
	 * 处理自定义的业务异常
	 * @param req
	 * @param e
	 * @return
	 */
    @ExceptionHandler(value = BizException.class)  
    @ResponseBody  
	public  ResultBody bizExceptionHandler(HttpServletRequest req, BizException e){
    	logger.error("发生业务异常！原因是：{}",e.getErrorMsg());
    	return ResultBody.error(e.getErrorCode(),e.getErrorMsg());
    }
	/**
	 * 处理空指针的异常
	 * @param req
	 * @param e
	 * @return
	 */
	@ExceptionHandler(value =NullPointerException.class)
	@ResponseBody
	public ResultBody exceptionHandler(HttpServletRequest req, NullPointerException e){
		logger.error("发生空指针异常！原因是:",e);
		return ResultBody.error(CommonEnum.BODY_NOT_MATCH);
	}
    /**
        * 处理其他异常
     * @param req
     * @param e
     * @return
     */
    @ExceptionHandler(value =Exception.class)
	@ResponseBody
	public ResultBody exceptionHandler(HttpServletRequest req, Exception e){
    	logger.error("未知异常！原因是:",e);
       	return ResultBody.error(CommonEnum.INTERNAL_SERVER_ERROR);
    }
}